﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace rmeloni.Helpers
{
    public static class HelpersPageSize
    {
        public static int PageSizeValue = 10;
    }

    public class PaginatedList<T> : List<T>
    {

        public int PageIndex { get; private set; }
        public int PageSize { get; private set; }
        public int TotalCount { get; private set; }
        public int TotalPages { get; private set; }

        public PaginatedList(IQueryable<T> source, int pageIndex, int pageSize)
        {
            if (source != null)
            {
                PageIndex = pageIndex;
                PageSize = pageSize;
                TotalCount = source.Count();
                TotalPages = (int)Math.Ceiling(TotalCount / (double)PageSize);

                var sourceList = source.ToList();
                if (PageSize > 0)
                {
                    var sourceskiped = sourceList.Skip(PageIndex * PageSize);
                    var sourcetake = sourceskiped.Take(PageSize);
                    this.AddRange(sourcetake);
                }
                else
                {
                    this.AddRange(sourceList);
                }
            }
        }

        public bool HasPreviousPage
        {
            get
            {
                return (PageIndex > 0);
            }
        }

        public bool HasNextPage
        {
            get
            {
                return (PageIndex + 1 < TotalPages);
            }
        }
    }

}